Added warning when samples missing pheno or cov (#1653)
Added warning when samples missing pheno or cov (#1653)


danking/hail,hail-is/hail,danking/hail,danking/hail,hail-is/hail,cseed/hail,cseed/hail,hail-is/hail,hail-is/hail,cseed/hail,danking/hail,hail-is/hail,cseed/hail,danking/hail,danking/hail,cseed/hail,cseed/hail,hail-is/hail,cseed/hail,danking/hail,cseed/hail,danking/hail,hail-is/hail,hail-is/hail